retrograde wave造句

• Aquatic molluscs such as limpets, which are sometimes out of the water, tend to move using retrograde waves.
• Earthworms move by retrograde waves alternatively swelling and contracting down the length of their body, the swollen sections being held in place using setae.
• The waves may move in the opposite direction to motion, known as retrograde waves, or in the same direction as motion, known as direct waves.
• For frequencies ? < 0.9 the retrograde wave can be neglected, and there remains the circular propagating prograde wave where the vector of polar motion moves on a circle in anti-clockwise direction.